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---
layout: blog
title: "Kubernetes Removals and Deprecations In 1.24"
date: 2022-04-07
slug: upcoming-changes-in-kubernetes-1-24
---
**Author**: Mickey Boxell (Oracle)
As Kubernetes evolves, features and APIs are regularly revisited and removed. New features may offer
an alternative or improved approach to solving existing problems, motivating the team to remove the
old approach. Old APIs are first deprecated and then removed according to the [Kubernetes Deprecation Policy](/docs/reference/using-api/deprecation-policy/).
We want to make sure you are aware of the changes coming in the Kubernetes 1.24 release. The release will
**deprecate** several (beta) APIs in favor of stable versions of the same APIs. The major change coming
in the Kubernetes 1.24 release is the [removal of Dockershim](https://github.com/kubernetes/enhancements/issues/2221). This is discussed
below and will be explored in more depth at release time. For an early look at the changes coming in Kubernetes 1.24, take a look at the in-progress [CHANGELOG](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.24.md).
## A note about Dockershim
It's safe to say that the removal receiving the most attention with the release of Kubernetes 1.24
is Dockershim. Dockershim was deprecated in v1.20. As noted in the [Kubernetes 1.20 changelog](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.20.md#deprecation):
"Docker support in the kubelet is now deprecated and will be removed in a future release. The kubelet
uses a module called "dockershim" which implements CRI support for Docker and it has seen maintenance
issues in the Kubernetes community." With the upcoming release of Kubernetes 1.24, the Dockershim will
finally be removed.
In the article [Don't Panic: Kubernetes and Docker](/blog/2020/12/02/dont-panic-kubernetes-and-docker/),
the authors succinctly captured the change's impact and encouraged users to remain calm:
> Docker as an underlying runtime is being deprecated in favor of runtimes that use the
> Container Runtime Interface (CRI) created for Kubernetes. Docker-produced images
> will continue to work in your cluster with all runtimes, as they always have.
Several guides have been created with helpful information about migrating from dockershim
to container runtimes that are directly compatible with Kubernetes. You can find them on the
[Migrating from dockershim](/docs/tasks/administer-cluster/migrating-from-dockershim/)
page in the Kubernetes documentation.
For more information about why Kubernetes is moving away from dockershim, check out the aptly
named: [Kubernetes is Moving on From Dockershim](/blog/2022/01/07/kubernetes-is-moving-on-from-dockershim/)
and the [updated dockershim removal FAQ](/blog/2022/02/17/dockershim-faq/).
Take a look at the [Is Your Cluster Ready for v1.24?](/blog/2022/03/31/ready-for-dockershim-removal/) post to learn about how to ensure your cluster continues to work after upgrading from v1.23 to v1.24.
## The Kubernetes API removal and deprecation process
Kubernetes contains a large number of components that evolve over time. In some cases, this
evolution results in APIs, flags, or entire features, being removed. To prevent users from facing
breaking changes, Kubernetes contributors adopted a feature [deprecation policy](/docs/reference/using-api/deprecation-policy/).
This policy ensures that stable APIs may only be deprecated when a newer stable version of that
same API is available and that APIs have a minimum lifetime as indicated by the following stability levels:
* Generally available (GA) or stable API versions may be marked as deprecated but must not be removed within a major version of Kubernetes.
* Beta or pre-release API versions must be supported for 3 releases after deprecation.
* Alpha or experimental API versions may be removed in any release without prior deprecation notice.
Removals follow the same deprecation policy regardless of whether an API is removed due to a beta feature
graduating to stable or because that API was not proven to be successful. Kubernetes will continue to make
sure migration options are documented whenever APIs are removed.
**Deprecated** APIs are those that have been marked for removal in a future Kubernetes release. **Removed**
APIs are those that are no longer available for use in current, supported Kubernetes versions after having
been deprecated. These removals have been superseded by newer, stable/generally available (GA) APIs.
## API removals, deprecations, and other changes for Kubernetes 1.24
* [Dynamic kubelet configuration](https://github.com/kubernetes/enhancements/issues/281): `DynamicKubeletConfig` is used to enable the dynamic configuration of the kubelet. The `DynamicKubeletConfig` flag was deprecated in Kubernetes 1.22. As of v1.24, the feature gate was removed from the kubelet. See [Reconfigure kubelet](/docs/tasks/administer-cluster/reconfigure-kubelet/). Refer to the ["Dynamic kubelet config is removed" KEP](https://github.com/kubernetes/enhancements/issues/281) for more information.
* [Dynamic log sanitization](https://github.com/kubernetes/kubernetes/pull/107207): The experimental dynamic log sanitization feature is deprecated and was removed in v1.24. This feature introduced a logging filter that could be applied to all Kubernetes system components logs to prevent various types of sensitive information from leaking via logs. Refer to [KEP-1753: Kubernetes system components logs sanitization](https://github.com/kubernetes/enhancements/tree/master/keps/sig-instrumentation/1753-logs-sanitization#deprecation) for more information and an [alternative approach](https://github.com/kubernetes/enhancements/tree/master/keps/sig-instrumentation/1753-logs-sanitization#alternatives=).
* In-tree provisioner to CSI driver migration: This applies to a number of in-tree plugins, including [Portworx](https://github.com/kubernetes/enhancements/issues/2589). Refer to the [In-tree Storage Plugin to CSI Migration Design Doc](https://github.com/kubernetes/design-proposals-archive/blob/main/storage/csi-migration.md#background-and-motivations) for more information.
* [Removing Dockershim from kubelet](https://github.com/kubernetes/enhancements/issues/2221): the Container Runtime Interface (CRI) for Docker (i.e. Dockershim) is currently a built-in container runtime in the kubelet code base. It was deprecated in v1.20. As of v1.24, dockershim has been removed from kubelet. Check out this blog on [what you need to do be ready for v1.24](/blog/2022/03/31/ready-for-dockershim-removal/).
* [Storage capacity tracking for pod scheduling](https://github.com/kubernetes/enhancements/issues/1472): The CSIStorageCapacity API supports exposing currently available storage capacity via CSIStorageCapacity objects and enhances scheduling of pods that use CSI volumes with late binding. The CSIStorageCapacity API is stable as of v1.24. The v1beta1 CSIStorageCapacity API is deprecated in v1.24. Refer to the [Storage Capacity Constraints for Pod Scheduling KEP](https://github.com/kubernetes/enhancements/tree/master/keps/sig-storage/1472-storage-capacity-tracking) for more information.
* [The `master` label is no longer present on kubeadm control plane nodes](https://github.com/kubernetes/kubernetes/pull/107533). For new clusters, the label 'node-role.kubernetes.io/master' will no longer be added to control plane nodes, only the label 'node-role.kubernetes.io/control-plane' will be added. For more information, refer to [KEP-2067: Rename the kubeadm "master" label and taint](https://github.com/kubernetes/enhancements/tree/master/keps/sig-cluster-lifecycle/kubeadm/2067-rename-master-label-taint).
* [VolumeSnapshot v1beta1 CRD will be removed in v1.24](https://github.com/kubernetes/enhancements/issues/177). Volume snapshot and restore functionality for Kubernetes and the [Container Storage Interface](https://github.com/container-storage-interface/spec/blob/master/spec.md) (CSI), which provides standardized APIs design (CRDs) and adds PV snapshot/restore support for CSI volume drivers, entered beta in v1.20. VolumeSnapshot v1beta1 was deprecated in v1.21 and is now unsupported. Refer to [KEP-177: CSI Snapshot](https://github.com/kubernetes/enhancements/tree/master/keps/sig-storage/177-volume-snapshot#kep-177-csi-snapshot) and [kubernetes-csi/external-snapshotter](https://github.com/kubernetes-csi/external-snapshotter/releases/tag/v4.1.0) for more information.
## What to do
### `kubectl convert`
The [`kubectl convert`](/docs/tasks/tools/included/kubectl-convert-overview/) plugin for `kubectl`
can be helpful to address migrating off deprecated APIs. The plugin facilitates the conversion of
manifests between different API versions, for example, from a deprecated to a non-deprecated API
version. More general information about the API migration process can be found in the [Deprecated API Migration Guide](/docs/reference/using-api/deprecation-guide/).
Follow the [install `kubectl convert` plugin](https://kubernetes.io/docs/tasks/tools/install-kubectl-linux/#install-kubectl-convert-plugin)
documentation to download and install the `kubectl-convert` binary.
### Looking ahead
The Kubernetes 1.25 and 1.26 releases planned for later this year will stop serving beta versions
of several currently stable Kubernetes APIs. The v1.25 release will also remove PodSecurityPolicy,
which was deprecated with Kubernetes 1.21 and will not graduate to stable. See [PodSecurityPolicy
Deprecation: Past, Present, and Future](/blog/2021/04/06/podsecuritypolicy-deprecation-past-present-and-future/) for more information.
The official [list of API removals planned for Kubernetes 1.25](/docs/reference/using-api/deprecation-guide/#v1-25) is:
* The beta CronJob API (batch/v1beta1)
* The beta EndpointSlice API (discovery.k8s.io/v1beta1)
* The beta Event API (events.k8s.io/v1beta1)
* The beta HorizontalPodAutoscaler API (autoscaling/v2beta1)
* The beta PodDisruptionBudget API (policy/v1beta1)
* The beta PodSecurityPolicy API (policy/v1beta1)
* The beta RuntimeClass API (node.k8s.io/v1beta1)
The official [list of API removals planned for Kubernetes 1.26](/docs/reference/using-api/deprecation-guide/#v1-26) is:
* The beta FlowSchema and PriorityLevelConfiguration APIs (flowcontrol.apiserver.k8s.io/v1beta1)
* The beta HorizontalPodAutoscaler API (autoscaling/v2beta2)
### Want to know more?
Deprecations are announced in the Kubernetes release notes. You can see the announcements of pending deprecations in the release notes for:
* [Kubernetes 1.21](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.21.md#deprecation)
* [Kubernetes 1.22](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.22.md#deprecation)
* [Kubernetes 1.23](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.23.md#deprecation)
* We will formally announce the deprecations that come with [Kubernetes 1.24](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.24.md#deprecation) as part of the CHANGELOG for that release.
For information on the process of deprecation and removal, check out the official Kubernetes [deprecation policy](/docs/reference/using-api/deprecation-policy/#deprecating-parts-of-the-api) document.